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Is the size/wieghts on the 4 speed transmission diff. for a 350 engine compared to a 454cu. Weights on the flywheel that is. if there is any, thanks Just trying to find out where the vibration is coming from.
Yes. All factory small blocks except 400ci and all factory big blocks except 454's are internally balanced and the flywheels are interchangable.
454's and 400ci SB are externally balanced and need a weighted flywheel and harmonic balancer. They are NOT interchangable with any internally balanced engine.
If you use an neutral balanced flywheel(internally balanced) on a 400 SB or a 454 BB then you will have a severe vibration.